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Learn more by watching our Major Tech MT994 | Process Calibrator video.
The Major Tech MT994 is a multifunction process calibrator and signal generator that sources and measures current, voltage, millivolts, frequency, resistance, and temperature signals from a single pocket-sized instrument. Two independent channels let the MT994 generate one signal while measuring another, so a transmitter can be driven and its output verified in the same connection. Sourcing and measurement both cover 0-24mA and 0-24V, with simulation for Pt100 and Cu50 RTDs plus 10 thermocouple types spanning 0°C to 2320°C. A 2.4 inch TFT colour LCD presents live readings and a real-time curve of signal trends, powered by a rechargeable 3000mAh lithium battery.
Commissioning a control loop with separate instruments turns a simple task into a bench-clearing exercise. One tool supplies the 24V loop power, another reads the transmitter current, and a third simulates the thermocouple or RTD at the sensor end. Every changeover adds another chance to misread a fault. The MT994 brings sourcing and measurement into one handheld, powering a two-wire transmitter from its 24V loop function while showing the return current on the same screen. Signal conversion and engineering-quantity scaling turn raw values into the percentages a controller expects, so checks happen at the instrument rather than back at the panel.
For techs who split their week between switchboards and process plants, one instrument that speaks mA, mV, Hz, and ohms earns its pocket space quickly. Programmed ramp output cycles a valve or PLC input automatically, stepping between set values for ageing tests that would otherwise chew up an afternoon of manual adjustment. Four preset signal values recall your usual test points at a keypress, and the history record stores readings for review on screen after the job. Modbus RS485 communication even lets the MT994 slot into configuration software as a slave device.
The MT994 is not waterproof and carries no ingress protection rating, so keep it away from high humidity, dust, and direct sunlight. Input terminals are limited to 30V peak, and exceeding that limit can damage the instrument. Because the unit is built for process signal levels, it is not a substitute for a CAT-rated multimeter on mains or switchboard measurement.
(MT994)
It sources and measures current from 0-24mA, voltage from 0-24V, millivolts from -10 to 100mV, frequency to 9999Hz, and resistance to 390 ohms. It also simulates Pt100 and Cu50 RTDs plus 10 thermocouple types, with dual channels handling one input and one output simultaneously.
The calibrator outputs 24V to power a two-wire transmitter or control valve while measuring the loop current it draws, displayed on the same screen. The IN- port can also switch to an independent 24V supply, letting you power a device and read its feedback at the same time.
Ten types in total: S, B, E, K, R, J, T, and N, plus tungsten-rhenium WRe3/25 and WRe5/26 reaching 2320°C. Cold junction compensation can use the meter's own detected temperature or a user-defined value, and readings display in Celsius or Fahrenheit.
The built-in 3000mAh lithium battery runs around 26 hours on standby, or 8-10 hours with a continuous 20mA output. Charging is through a Type-C port accepting 5-12V DC at up to 10W, with the power button glowing red while charging and blue once full.
Yes. Programmed output ramps a signal through single rise, single fall, or repeating cycles, up to 30,000 loops with adjustable step values and timing. That automates ageing tests on electric and pneumatic valves and exercises PLC inputs without constant manual adjustment. Four preset values also recall common test points instantly.
No. The manual states the instrument is not waterproof and should stay clear of high humidity, dust, direct sunlight, and strong vibration. Its input terminals are also limited to 30V peak, so treat it as a signal-level tool rather than a general electrical tester.
It carries a 2 year warranty for both domestic and commercial use, starting from the invoice date. Lodge a claim by returning the unit to Sparky Direct with proof of purchase and a fault description; it is then forwarded to Major Tech's authorised service centre for assessment. Allow 7 to 14 working days.
The Major Tech MT994 is available online from Sparky Direct, with Australia-wide delivery to any state or territory including regional areas. Sparky Direct is an Australian electrical wholesaler established in 2005, supplying more than 500,000 customers with transparent trade pricing.
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All products come with a manufacturer’s or supplier’s warranty
Damaged or Faulty Goods
If your order arrives damaged or is faulty, let us know within 24 hours.
Contact us via our chat to arrange the return.
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How to Request a Return
Warranty starts from Invoice Date
Domestic Use: 2 Year
Commercial Use: 2 Year
Warranty Method: Return to Sparky Direct
All Major Tech Meters sold through Sparky Direct are covered by the manufacturer’s warranty. If you believe your meter is faulty or defective, you may request an assessment under this warranty policy.
To initiate a warranty claim:
Return to Sparky Direct
Ship the meter back to Sparky Direct along with:
Please ensure the unit is securely packaged to prevent damage in transit.
Forwarded for Assessment
Upon receiving your meter, we will forward it to Major Tech’s authorised service centre for inspection, testing, and calibration.
Major Tech’s service lab will assess the returned unit to determine:
As Major Tech’s service labs are independent providers, Sparky Direct cannot govern or guarantee turnaround times or any costs incurred for repairs outside of warranty coverage.
| Function | Range | Precision | Resolution |
|---|---|---|---|
| Active Current Output | 0 to 24mA | ±(0.02%+0.003) | 0.001mA |
| Voltage Output | 0 to 24V | ±(0.02%+0.003) | 0.001V |
| 24V Loop | 0 to 24mA | ±(0.02%+0.003) | 0.001mA |
| Frequency Output (PWM) | 0 to 9999Hz | ±(2%) | 5 digits |
| Milli-voltage | -10 to 100mV | ±(0.03%+0.03) | 0.01mA |
| Thermocouple (TC-K) | 0 to 1320°C | ±(0.2%+1) | 1°C |
| Thermocouple (TC-S) | 0 to 1760°C | ±(0.2%+1) | 1°C |
| Resistance Measurement | 0 to 390Ω | ±(0.2%+1) | 0.1Ω |
| RTD (PT100) | -200 to 650°C | ±(0.5%+1) | 0.1°C |
| RTD (CU50) | -20 to 150°C | ±(0.5%+1) | 0.1°C |
These specifications and characteristics outline physical, mechanical, electrical details.
| Brand | Major Tech |
| SKU | MT994 |
| Model # | MT994 |
| Barcode # | 6008229040986 |
| Package Weight | 0.476kg |
| TYPE | VALUE |
|---|---|
| Type | Earth/Loop/PSC Testers |
| Brand | Major Tech |
| Power Source | Rechargeable Li-ion Battery |
| Output Voltage | 0 - 24V |
| Battery | 3000mAh Rechargable |
| Output Current | 0 - 24mA |
| Thermocouple | 0 - 2320°C |
Electrical and HVAC products sold by Sparky Direct are intended for installation by licensed and appropriately qualified professionals in accordance with applicable Australian Standards and regulatory requirements. Customers are responsible for ensuring that any product purchased, including any related or associated components, is compatible and suitable for their intended installation and application.
Sparky Direct does not provide installation advice and does not assess product suitability for individual circumstances unless expressly confirmed in writing. Customers must confirm correct product selection, compatibility, compliance, and suitability with a licensed or appropriately qualified professional prior to purchase.
Tools sold by Sparky Direct must be used safely and in accordance with the manufacturer’s instructions. Customers are responsible for ensuring they have the necessary knowledge and competence to operate any tool purchased. If you are unsure how to safely or correctly use a tool, do not use it and seek guidance from the manufacturer or a suitably qualified professional.
Nothing in this clause limits or excludes any rights or guarantees available under the Australian Consumer Law.
For website terms and conditions https://www.sparkydirect.com.au/terms-of-use
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